package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        //创建具有2条线程的线程池
        ExecutorService threadPool = Executors.newFixedThreadPool(2);

        for (int i = 0; i < 5; i++) {
            Runnable r = new Runnable() {
                @Override
                public void run() {
                    try {
                        Thread t = Thread.currentThread();
                        System.out.println(t.getName()+"正在执行一个任务....");
                        Thread.sleep(5000);
                        System.out.println(t.getName()+"执行完毕....");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            };
            threadPool.execute(r);
            System.out.println("将一个任务交给了线程池吗");
        }
        //关闭线程池
        //threadPool.shutdownNow();//立即停止线程池
        threadPool.shutdown();
        System.out.println("停止线程池");
    }
}
